Safety-valve



(No Model.)

A. LOHBILLER.

SAFETY VALVE.

No. 498,802. Patented June 6', 1893.

THE nonms mans co, Pnmuumm wnsxincmn. n. c.

UNITED STATES PATENT OFFICE.

ANTON LOHBILLER, OF BOSTON, MASSACHUSETTS.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 498,802, dated June 6, 1893. Application filed March 18, 1893. Serial No. 467,388. (No model.)

T0 to whom, it may concern:

Be it known that I, ANTON LoHBILLEa, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and usefulImprovement in Safety-Valves, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claims.

My invention relates particularly to the devices employed in safety-valves for regulating the escape of steam therefrom after the valve is lifted, to secure prompt reaction of the valve without undue waste of steam in relieving the boiler, and is an improvement upon the valves described in Letters Patent issued to me November 17, 1891, and December 13, 1892, and respectively numbered 463,261 and 488,020.

The object of my present invention is to simplify the construction of such regulating device and at the same time to make it more conveniently accessible and readily and effectively adjustable.

In the accompanying drawings, Figure 1 is an elevation of a valve embodying my invention. Fig. 2 is a central vertical section of the same. Fig. 3 is a top view of the valve case. Fig. 4 is a top view of the valve complete, as represented in Fig. 1. Fig. 5 is a detached elevation of the adjustable ring with its lifting standards or rods.

In the drawings, A is the base; B the valveseat formed on said base; 0 the valve; D the spindle; E the depressing spring; F the follower; G the hollow compressing screw; H the valve casing havinga perforated top; I the upward extending neck or hub of the case, threaded internally and externally; J the cap which screws on to the neck; K the muiflier secured on top of the casing; all which said designated parts are of common construction and well known and need no further description here.

L is the ring which is concentric with the valve-seat and valve and of slightly greater diameter and the vertical adjustment of which regulates the escape of the steam through the annular aperture between the valve and valveseat which exists when the valve is lifted. The devices hereinafter described for eifecting such vertical adjustment of the ring,

form the principal feature of my present invention.

To ring L are-secured two upright standards or lifting rods M. M. in the upper ends of which are out two diametrical slots or notches N. N. These standards extend upward through holes in the top of the casing and through the muffler, as shown clearly in Fig. 2. The mutlier is secured upon the annular shoulder of the casing by a thin nut P threaded on to neck I, as shown.

AperforatedannularadjustingnutRshown in section in Fig. 2 and in plan in Fig. 4-, is threaded on to neck I and extends therefrom diametrically into the notches N. N. in the standards M. M. and turns freely therein to raise and lower said standards accordingly as said nut is screwed up or down on said neck. Thus by revolving the annular nut R about the threaded hub or neck I, with its rim interlocked with the notches N the proper vertical adjustment of ring L is very conveniently effected by a single operation at one point and without disturbing any other parts of the mechanism excepting the cap J, which serves when turned down against the nut to secure it in whatever position it may be so adjusted. To place this threaded ring or nut R in the notches N the cap T is first removed and the standards M are raised, as indicated by dotted lines in Fig. 2, and the rim of the nut inserted in the notches while so elevated above all the other parts; and then the nut and standards are together dropped until the threads within the central aperture in the nut are in position to engage the threads on the exterior of the neck, when by revolving the nut itis screwed up or down on said neck carrying the standards with it as before stated. The nut is perforated to ofterless obstruction to the steam blown off through the muiiier.

In my former Patent No. 463,261, dated November 17, 1891, the standards connected with the ring which correspond to the standards M., in my present invention, extended upward and terminated in a threaded collar which was revolved, together with the ring and standards, by a gear and pinion, and was arranged to screw up and down in a portion of the case threaded on the interior. It was adjustable upon the exterior of the case by a single operation at one point without removing any part of the casing. But my present invention is much less complicated in its construction and equally effective in operation,

5 and being located above both the main casing and the muflier the steam blown off through the latter keeps the devices at the point of adjustment clean and less liable than they are when inclosed to become affected by corrosion or obstructive sediment by which its proper operation might be impaired. And as such valves are adjusted to blow back a certain amount before closing and tested before the muffler is applied; and as the application of the muffier affects such adjustment, so that it frequently is necessary to readjust the valve after the muffler is added, to cou uteract the effect thereof on the blow back, such readjustment is greatly facilitated by having the adjusting device located, as in my inven- 0 thus get rid tion, above the muiliier; thereby avoiding the necessity of removing the same and being compelled to experiment with the adjustment with reference to such effect of the muflier when it is replaced.

I have discovered that by merely thickening or forming a protuberance on a portion of one side of the ring as indicated at S in Fig. 5, it will prevent fluttering of the valve and of an annoying action common to such valves, and avoid the wear of the mechanism resulting from such useless and nudesirable vibration.

I claim 1. A safety-valve embodying the combination of a valve-seat B; a valve 0; a vertically adjustable ring L, encircling the valve and valve-seat; lifting rods M. M. attached to the ring, and provided with notches N. N.; an inclosing case ll, provided with a threaded central hub or neck I; and a nut R threaded upon said neck and interlocked with the notches in the lifting rods, whereby the rotation of the nut raises or lowers the rod and their attached ring, as and for the purposes specified.

2. A safety-valve embodying the combination of a base A having a valve-seat formed thereon; a valve 0 and suitable mechanism for holding the same upon its seat; an inclosing case H secured upon the base and provided with a threaded neck I; a mullier K secured upon the top of the case; a vertically adjustable ring L concentric with the valve and valve-seat; lifting rods M. M. attached to the ring and provided with notches N. N., and extended upward -through the inclosing case and muftier; a nut R threaded on to the neck and interlocked with the notches in the lifting rods above the top of the muffler; all substantially as and for the purposes specified.

8. In combination with a safety-valve, the vertically adjustable regulating ring L; the lifting rods M. M. attached thereto and extending through and above the inclosing case and provided with notches N. N.; the nut It threaded on to a central hub I and interlocked with said notches; and cap J also threaded on to the central hub and arranged to be turned against the nut, to secure the same in place when adjusted; all as and for the purposes specified.

at. The combination of ring L having a protuberance S formed upon one side thereof, with valve 0 and means for properly holding the valve upon its seat 13; and suitable means for vertically adjusting the ring in relation to the valve and valve-seat, subs'itantially as and for the purposes specified.

AN ON LOIIBILLER.

\Vitnesses:

EUGENE llUMPHREY, RALPH W. E. HOPPER. 

